4987091 has 2 divisors, whose sum is σ = 4987092. Its totient is φ = 4987090.

The previous prime is 4987079. The next prime is 4987109. The reversal of 4987091 is 1907894.

Together with next prime (4987109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4987091 - 2⁶ = 4987027 is a prime.

It is not a weakly prime, because it can be changed into another prime (4987891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2493545 + 2493546.

It is an arithmetic number, because the mean of its divisors is an integer number (2493546).

Almost surely, 2^4987091 is an apocalyptic number.

4987091 is a deficient number, since it is larger than the sum of its proper divisors (1).

4987091 is an equidigital number, since it uses as much as digits as its factorization.

4987091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 4987091 is about 2233.1795718213. The cubic root of 4987091 is about 170.8503073094.

The spelling of 4987091 in words is "four million, nine hundred eighty-seven thousand, ninety-one".